Rule 34 Dev - 1boy 2021 abs anthro anus bed big_muscles bound bulge canid canine canis clothing delta3814 dobermann domestic_dog footwear furniture hands_behind_head hi_res jockstrap knee_highs knee_socks legwear looking_at_viewer lying male male_only mammal muscular muscular_anthro muscular_male narrowed_eyes navel nipples on_back on_bed pecs pinscher sex_toy smile socks solo spread_legs spreading underwear|6123023392